Program to Convert Decimal Number to Octal Number in c++

#include<iostream>
#include<conio.h>
#include<math.h>
using namespace std;
int Decimal_to_Octal(long n)
{
        int octal_number = 0, i = 1, remainder;
        while(n!=0)
        {
                remainder = n%8;
                n = n/10;
                octal_number = octal_number + (remainder*i);
                i = i*10;
        }
        return octal_number;
}
int main()
{
        long num;
        cout<<"Enter a decimal number : ";
        cin>>num;
        cout<<"Decimal Number "<<num<<" is equal to "<<Decimal_to_Octal(num)<<" Octal Number."<<endl;
        getch();
        return 0;
}


Output